--- In
PolySix@yahoogroups.com, "Andrew Jury" <andy@...> wrote:
>
> Hi,
>
> This sounds like another job that might require access to an
> oscilloscope! What might be an idea is to generate a single known
> waveform (i.e. a saw at A440) on one voice and then, starting at
the
> output (the hot end of VR1 on the KLM369) work back through the
> signal path until you reach the voice mixer (which is the output
from
> op-amp IC10) So:
>
> KLM369 CN15/3 -> KLM368 CN14/1, KLM366 CN14/1
>
> Then compare the waveforms at each waypoint. My feeling here is
that
> you might find the signal is getting affected by the circuitry on
the
> effects boards. Yes, of course, but not in a way we want. Does the
> nature of the sound change as you operate the effect type and
> intensity at all?
>
> Cheers,
> Andy
>
> --- In PolySix@yahoogroups.com, "wasteking1" <wasteking1@> wrote:
> >
> > im still fooling with my '367-fixed' polysix and it seems that
when
> i
> > play multiple notes simultaneously, the background hiss/white
noise
> > increases as if it is amplified with each sucessive added voice
as
> > notes are added to a chord . some sounds hide it, but its
> noticeable
> > on many patches. I know i have this noisy pulsing VCA on the MG
> > section that i posted about before, and was told to check out
> around IC
> > 20/21 on the 387. While this other white noise doesnt pulse , it
> is
> > similar in tonal quality . The results of this is that the
polysix
> just
> > sounds 'dirty', and seems not right. could they be related?
> >
>
It seems that the nature of the "additive' white noise generaly
stays the same, but on some patches it seems that it is a bit
diffrentin pitch when i play bass notes rather than high pitched
ones.And still, some patches seem fine. When i hear the noise i can
increase its intensity with the attenuator. If the sound has the MG
set on VCA (or i switch it to VCA) i then get the white noise
pulsing in the background , even when NO notes are played. (that is
the most annoying, because there should be silence. ) this is subtle,
but clearly there and not subtle when it pulses. The MG frequency and
level controls DO affect the pulsing white noise.